[Discuss-gnuradio] header_payload_demux

[xianda]

Hi:

      Thank you in advance.

      I have two simple question:

     1.In the grc,i see a block: header_payload_demux  

      It has 3 input:in,trigger,header_data.But i see the header_payload_demux_impl.cc:iosignature::make2(1,2,..,..).But it has 3 input,why?

     Thank you.

     2.fft:I see the shift:yes.

      I want to save the symbol to file sink and analyse by matlab.But now i don't know it's shift earlier or fft earlier?

     Thank you.

Best regards,

xianda